Rough rounding machine



May.l7,1-949. (3. w. BAKER 2,470,127

' ROUGH ROUNDING MACHINE 3 Sheets-Sheet 1 Filed March 24, 1948 [nvenzor Com/m M 50 her I y Afforze:

May 17, 1949. c. w. BAKER ROUGH ROUNDING MACHINE s Sheets-Sheet 2 Filed March 24, 1948 I Pi 7 ulliilil- Even for Com in 14/ flake)" May 17, 1949.

5 Sheets-Sheet 3 Filed March 24, 1948 M m Fae V /K n d ar 0 A m f M12. 3 w i n. w v m m WM m w M 1 w W m 0 w E y w/ 2 6 Fe W m U a 0d w 0 w n 6 woww mc d 6 fm r v E 97 n M 6 F J E n cL P 0 WI} N mmr W N 0 6 7 9 mm: 5 w A Rd? E m .v Y PM 0 mm W F. F N V m m M N w m K A c B Patented May 17, 1949 ROUGH ROUNDING MACHINE Corwin W. Baker, Beverly, Mass., assignor to United Shoe Machinery Corporation, Flemington, N. J a corporation of New Jersey Application March 24, 1948, Serial No. 16,783

4 Claims.

This invention relates to machines for rough rounding shoe soles, and more particularly, is concerned with improving the certainty and steadiness of the feeding action of a rounding machine of the type disclosed in United States Letters Patent No. 1,030,606, granted on June 25, 1912, upon an application of F. H. Perry.

Machines of this type comprise a reciprocating knife, an anvil which supports the upper margin of the sole of a shoe against the cutting action of the knife, a bottom-rest engaged by the shoe bottom, and two guides-a crease-guide and a forepart-guide.

The crease-guide has a pair of spaced legs, one at each side of the anvil, the legs being connected at their lower ends by a bar disposed immediately below the anvil and arranged to seat in the bottom of the welt-crease or groove between the upper margin of the sole and the adjacent side of the shoe upper. With this relation between the anvil and crease-guide, the former supports a narrow portion of the sole margin extending inwardly from the edge as trimmed by the knife; and the latter supports the remaining width of the sole margin extending into the bottom of the weltcrease.

The shoe is yieldingly urged toward the anvil and crease-guide by the bottom-rest which supports a portion of the shoe bottom extending inwardly thereof from a point opposite to the tip of the anvil across the area opposite to the creaseguide. It will now be evident that the opposed relation between the crease-guide and bottomrest is more conducive to an effective gripping action upon the sole than is the offset relation between the anvil and the bottom-rest.

In view of the foregoing, the illustrated machine has for its principal work feeding members the crease-guide and the bottom-rest, which are moved together through a feeding stroke in one direction followed by a return stroke in the opposite direction. The invention, in accordance with one of its features, provides the combination with this structure of a knife and anvil, and means for reciprocating them toward and away from each other during the return and feeding strokes respectively of the guide and bottom-rest, whereby the sole is trimmed and its pressure against the guide is relieved during the return stroke of the guide, minimizing any tendency toward backfeeding of the work between successive feeding movements thereof.

For the sake of steadiness in the feeding action, the feeding movement of the crease-guide is one of oscillation parallel to the cutting plane of the knife. Thus, the feeding motion of the creaseguide has no component directed transversely of the line of cut of the knife which would tend to move the shoe in such a manner as to cause a variation in the desired width of the sole-edge extension.

To this same end, the anvil of the illustrated machine is so shaped and arranged, in accordance with another feature of the invention, as to deflect the outer margin of the sole away from the crease-guide without perceptibly movin the shoe bodily with respect to the end of the creaseguide which bottoms in the welt crease. More specifically, this action of the anvil upon the sole is obtained by inclining the work-engaging face of the anvil so that when it is in its advanced position (toward the knife), its tip is substantially in alinement with the work-engaging surface of the crease guide, and its surface leading away from the tip diverges away from the creaseguide toward the sole. Accordingly, each time when the anvil is moved from its retracted position, away from the sole margin, into its advanced position, the pressure of the sole against the end of the crease-guide is relieved and the sole margin is bent away from the crease-guide where it otherwise would be engaged by the crease-guide during its return stroke.

These and other features of the invention will now be described in greater detail in the following description with reference to the accompanying drawings, in which,

Fig. 1 is a side elevation of an illustrative machine embodying the invention;

Fig. 2 is a front elevation of the work guiding and feeding elements of the machine;

Fig. 3 is a fragmentary plan view partly in section of the crease-guide and the operating means therefor;

' Fig. 4 is a sectional plan view illustrating, with slight exaggeration, the bending of the sole margin away from the crease-guide by the anvil during the return stroke of the crease-guide;

Fig. 5 is an enlarged sectional elevation corresponding to Fig. 4; and

Fig. 6 is a, diagram showing the relation of the movements of the principal operating elements of the machine during one cycle of its operation.

The illustrated machine is generally similar to that of the above-mentioned Perry patent to which reference may be made, if desired, for a complete description of such parts and features of the illustrated machine as are not required to be fully disclosed herein for an understanding of the present invention. The present machine comprises a bottom-rest it, a knife 12, a creaseguide I4 and a forepart-guide it, all of which are constructed like the corresponding parts of the prior machine. The knife I2 is carried by a slide [8 which is reciprocated in a slideway in the frame [9 so as to cause the knife to operate with a chopping action against an anvil 2b. This motion of the knife is derived from connections (as in the prior machine) between the slide l8 and the forward end of the main drive shaft 22 on the rear end of which is mounted a driving pulley 24. Movements of the bottom-rest Hi and anvil 20 are derived from a cam disk 28 which is'fixed to the central portion of the drive shaft 22. As in the prior machine, connections between the cam disk and the bottom-rest it cause the latter to be oscillated with a work-feeding stroke (Fig. 6) from the right toward the left (Fig. 2), this stroke being followed, after a short period of rest, by a quick return stroke at the end of which the bottom-rest is in the position from which the succeeding feeding stroke starts.

.A shoe to be rounded in the machine is presented thereto with its bottom against the bot tom-rest l and a pad 23, the upper margin of the sole being engaged by the crease-guide l4 against which the shoe is pressed vertically by the operator, the crease-guide bottoming in the crease or groove between the upper margin of the sole and the adjacent portion of the shoe upper. The crease-guide thus positions the shoe heightwise relatively to the knife, in order to determine the width of the sole edge extension, as iswell understood in the art, while the shank portion-of the sole is being rounded. As the rounding out approaches the forepart, the control of the shoe is shifted from the crease-guide Hi to the forepart-guide it, which is carried by an arm I! mounted to swing about a horizontal axis. This arm is lowered to bring the forepart-guide into operative position by depressing a treadle (not shown) which lowers a treadle rod 38, this rod being connected to the arm ll as in the Perry machine. When the rounding out passes from the forepart into the shank, release of the treadle rod 30.permits the forepart-guide Hi to rise out of contact with the shoe, whereupon the creasegnideM again takes over the control of the shoe. Thecrease-guide 14 also has a limited heightwise movement, being mounted on the outer end of an arm 32 which is arranged to swing about a horizontal stud 34. This movement of the creaseguide is derived from and is under the control of mechanism 35 (Fig. 1) associated with both the crease-guide and the forepart-guide, this mechanism also being substantially the same as in the above-.mentioned Perry machine.

Simultaneously with the arrival of the forepart-guide H in its operative position, the creaseguide 14 rises very slightly away from the shoe upper'so as not to interfere with the guiding action of theforepart-guide. This movement of the crease-guide is provided by a spring 36 stretched between the forewardend of the arm 32 and the frame I9, and is limited by the engagement of a roller-stop 31, carried by the arm I'l, with'an abutment 38 associated with the creaseguide. For purposes of adjustment, the abutment138 is threaded into a lug-39 which is fixed, with'the crease-guide, on the forward end of the armw32.

It;is to be understood that the lower portion of thecrease-guide [4, even when in its-raised position is well below. the upper edge of the bottomrest Ill. The bottom-rest and the crease-guide thus being opposite to each other at all times are positioned so as to have an effective gripping action on the sole margin whether in the shank or in the forepart.

The anvil 28, unlike the corresponding member of the prior machine, has no work feeding movement; but it is reciprocatedtoward and away from the knife E2 in thesame manner and by the same mechanism as formerly. Briefly, this reciprocating movement of the anvil is derived from the cam disk 26 which has a groove ll] in which runs a roll ii, the latter being associated with a slide which isfixed to the shank d2 of the anvil. The shank is arranged to reciprocate axially in the frame. The anvil is held against rotative movement by an arm 43 integral with a sleeve 44 which is pinned at 46 to-the shank 42. On the end of the arm 43 is rotatably mounted a roll 48 which is received in a circular groove 50 formed in the rear side of the cam disk 26 concentric therewith. Asindicated by Fig. 6, the anvil 29' is quickly advanced toward the knife during the midportion of the cutting stroke of the knife, and is held in its advanced position until the knife, after having completed its cutting-stroke, reaches the midportion of its return stroke, whereupon the anvil is quickly retracted away from the knife. The anvil is held in its-retractedposition during the remainder of the return stroke ofthe knife and until the latter again reaches the midportion of its next cutting stroke.

The feeding of the work is accomplished in the present machine by the cooperation of the crease-guide M with the bottom-rest iii. Forthis purpose, the crease-guide'is mounted to swing about a vertical axis with a feeding movement of about A, from the right toward the left (as viewed in Fig. 2) in synchronismwith the similar above-mentioned feeding movement of the bottom-rest. The mechanism for thus operating the crease-guide will now be described in detail. The above-mentioned stud 34, on which the-crease guide arm 32 swings, is carried by a block 52 from which there extends upwardly a shank 54 arranged to rotate freely within a vertical recess 56 formed in the frame it. A shoulder 58, integral with the block 52, overlies an-angular support-B0 which is fixed to the frame and holds the upper surface of the block seated against the frame. An arm 62 extendingto the rear of the machine is fixed to the lower side of the block-52 by a screw lid. This arm near its rear end is received in a horizontal slot 69 formed in abracket'68 which is fixed to the frame, whereby the arm is permitted to swing freely in a horizontal plane, but issupported by the bracket against any'vertical displacement. To the rear end of thearmrfia isfixed a ball-ended stud ill to which is-con nected an adjustable eccentric strap 12, the strap being arranged to run on an eccentric 74 which is fixedto the drive shaft 22.

It will now be evident that the crease guide I4 is oscillated with a simple harmonic motion about the axis of the shank 5d; and the eccentric. is so positioned on the shaft 22' as to cause the feeding movement of the crease-guide Hi, from right to left, tooccur simultaneously with the same movement of the bottom-rest it]. It is also to .be noted thatneither the feeding stroke nor the return stroke of the crease-guide has any component of movement directed transversely (heightwise) of the cutting plane of'theknife. Accordingly, the feeding motion of the creaseguide has no tendency to disturbtheposition of the work with respect to the knife, by which the width of the sole-edge extension is determined.

A shoe to be rounded is presented to the machine with its sole-margin inserted between the bottom-rest H! and the crease-guide M, the latter being seated in the bottom of the welt-crease below the anvil 20. The shoe is supported with its bottom in substantially a vertical position by engagement with the bottom-rest and pad 28. For this purpose the pad isadjustably mounted as will be described below, and is also arranged to seat itself flatly on the shoe bottom in response to pressure of the shoe against it in order to avoid marking the shoe bottom. Extending from the rear side of the pad are a pair of lugs 15 which are bored to receive a rod 13. The ends of this rod are received in holes formed in a pair of plates 80, one of which is mounted to swing on each side of a slide 82 (corresponding to the slide I83 of the Perry machine) on which the bottom rest it is mounted. These plates are arranged to swing about screws 84 which are threaded into the slide, and are adapted to be clamped in any desired position of adjustment by screws 86, which pass through arcuate slots 38 in the plates and are threaded into the slide 82. A light spring 59 which is coiled about the rod I8 is arranged to urge the pad toward the position in which it is shown in Fig. 1.

The timing of the cutting stroke of the knife and the feeding strokes of the bottom-rest and crease-guide is such that the knife begins to penetrate the work at the time when the feeding movement of the work terminates. At this same time, as indicated in Fig. 6, the anvil 20 is quickly advanced a short distance toward the knife from its retracted position. When in the latter position, the work-engaging surface of the anvil is forward of the plane of the work-engaging surface of the crease-guide I4, and spaced slightly from the sole margin as indicated in broken lines in Fig. 5. As will also be observed from Fig. 5, the work-engaging surface of the anvil 20 is inclined upwardly and toward the rear of the machine from its lower end. The stroke of the anvil toward the knife is of such length (approximately m") that when the anvil has been moved into its advanced position (shown by solid lines, Fig. the lower end of its work-engaging surface is substantially in the plane of the workengaging surface of the crease-guide. However, owing to the divergence of the work-engaging surface of the anvil above its tip away from the crease-guide, the outer portion of the sole margin is bent slightly, away from the crease-guide, around the upper edge of the bottom-rest H3. The portion of the sole-margin opposite to, and extending a short distance at each Side of the crease-guide, is thus deflected a short distance away from the crease-guide except at the bottom of the welt-crease. At this locality, the tip of the anvil without bodily moving the shoe overcomes its pressure against the lower end of the crease-guide, which is caused by the yielding pressure of the bottom-rest l0 against the shoe bottom.

It is under these conditions that the return strokes of the crease-guide and bottom-rest take place. It is evident, therefore, that any tendency of the crease-guide to impart a back-feeding movement to the work is minimized owing to the facts that the crease-guide at its tip exerts little or no clamping pressure against the sole-margin, and that above its tip there is a clearance space between the crease-guide and the sole-margin.

The fact that the shoe is not moved bodily by the anvil further facilitates the proper guiding of the shoe. Otherwise, a wedging action would occur between the crease-guide and shoe which would tend to depress the shoe and hence increase the sole-edge extension.

The operation of the machine will now be briefly summarized. The shoe with its solemargin gripped between the bottom-rest l0 and crease-guide M is fed past the knife, from right to left, by intermittent feeding movements of the bottom-rest and crease-guide which occur simultaneously. During each feeding movement of the work, the anvil 20 is in its retracted position (as shown in broken lines, Fig. 5) out of engagement with the sole-margin. It is also to be noted with reference to Fig. 5 that the lower part of the crease-guide I4 is below the upper edge of the bottom-rest I0, and because of this arrangement the sole-margin is always effectively gripped for feeding purposes with no tendency for the shoe to be twisted in the operators hands.

At the completion of each feeding movement the anvil is quickly moved into its advanced position (as shown in full lines, Fig. 5), causing the sole-margin to be bent slightly away from the crease-guide except at its lower extremity. The pressure of the shoe against the crease-guide is thus relieved, and the upper edge of the sole is bent out of the path of movement of the creaseguide in its return stroke so that any tendency toward back-feeding of the work at this time by the crease-guide is minimized.

While the sole-margin is supported by the anvil 20, and during the return stroke of the creaseguide I4, the knife makes its out into the sole. Just as the knife reaches its advanced position, against the anvil, and when the gripping action of the knife and anvil upon the sole is the greatest, the bottom-rest makes a quick return stroke. Near the end of the return stroke of the creaseguide, the anvil is quickly moved away from the sole-margin, allowing the latter to become gripped again by the crease-guide in readiness for the next feeding movement of the creaseguide. At this time, the knife on its return stroke will also have moved away from the sole which is, therefore, free from any resistance to the succeeding feeding movement.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent of the United States is:

1. In a rounding machine, a knife, a guide for positioning a shoe relatively to said knife to determine the sole-edge extension, said guide being arranged to engage the upper margin of the sole in the welt-crease, a bottom-rest constructed and arranged yieldingly to hold the shoe against said guide, an anvil against which said knife cuts and arranged to support the margin of the sole outwardly thereof from said guide, means for moving said bottom-rest and guide through a feeding stroke in one direction and a return stroke in theopposite direction, and means for reciprocating said knife and anvil toward and away from each other at the beginning of the return and feeding strokes respectively of said guide and bottom-rest whereby the sole is trimmed and its pressure against said guide is relieved by said anvil during the return stroke of said guide.

2. In a rounding machine, a knife, a guide for positioning a shoe relatively to the knife to determine the sole-edge extension, said guide being arranged to engage the upper margin of the sole in the crease between the sole and the shoesemis?" 7. upper, a bottom-rest constructed and arranged yieldinglyto hold the shoe against said guide, an

anvil for supportingthe sole-margin opposite to,

said knife and mounted for movement into and out of engagement with the sole-margin adjacent to said guide, means for moving said bottom-rest and guide through a feeding stroke in one direction and a return stroke in the opposite direction, means for moving said anvil into engagement with the sole-margin at the beginning of the return stroke of said guide thereby to relievethe pressure of the shoe against said guide, and means for reciprocating said knife toward and away from said anvil.

3. ,In a'rounding machine, a knife, a guide for positioning a shoe relatively to the knife to determine the sole-edge extension, said guide being arranged to engage the upper margin of the sole in the crease between the sole and the shoeupper, a bottomerest for holding the shoe against said guide, an anvil for supporting the margin of the sole outwardly thereof from said guide, meansfor moving said guide alternateiy through a feeding stroke in one direction and a return stroke in the opposite direction, and means for reciprocating said knife and anvil toward and away from each other during the return and feeding strokes respectively of said guide, said S anv be hape andrz r need 0 d e the e mar n e endin u wa d y th r o f said guide away from said guide durin its turn stroke.

4. In a rounding machine, a knife, a guide for positioning a shoe relatively to said knife to determine the sole-edge extension, said guide being arranged to en age the upper margin of the sole in the welt crease, a bottom-rest for holding the shoe against said guide, an anvil arranged to support the margin of the sole extending outwardly thereof from saidguide against the cutting action of the knife, means for moving said guide alternately with a feeding stroke in one direction and a return stroke-in the opposite direction, and means for reciprocating said knife and. anvil toward and away from each other during the return and feeding strokes respectively of said guide whereby the sole is trimmed while being clamped by said anvil at one side of the line of out against said bottom-rest, the sole engaging surface of said anvil being inclined toward the sole at the other side of the line of cut whereby the outer portion of the sole margin is deflected away from said guide during its return stroke.

CORWIN W. BAKER.

No references cited. 

